Microworld

world of amoeboid organisms

Menu
Rhizamoeba clavarioides

 

Rhizamoeba clavarioides  (Penard, 1902) Siemensma, 1980

Diagnosis: cell in slow locomotion resembling a Clavaria mushroom; pseudopodia flattened, sharply tapering or broadly blunt; rapid monotactic form, slender; nucleus ovoid or spherical, nucleolus irregular.

Dimensions: monotactile form 70-220 µm; nucleus 9.6-15.5 µm.

Ecology: several types of water; between sediments.

Remarks: Rhizamoeba-species are usually covered with a layer of debris, which they also can leave easily to adopt a limax form for faster locomotion.

Rhizamoeba clavarioides
Rhizamoeba clavarioides, partially hidden by debris
Rhizamoeba clavarioides
Rhizamoeba clavarioides, nucleus
Rhizamoeba clavarioides
Rhizamoeba clavarioides in limax form
Rhizamoeba clavarioides
Rhizamoeba clavarioides, slow locomotion form
Rhizamoeba clavarioides
Rhizamoeba clavarioides, in transition from slow locomotion into rhizomonotactic form
Rhizamoeba clavarioides
Rhizamoeba clavarioides, hyaloplasm running back along sides
Rhizamoeba clavarioides
Rhizamoeba clavarioides, slow locomotion form
Rhizamoeba clavarioides
Rhizamoeba clavarioides
Rhizamoeba clavarioides, Crailoo (Phase Contrast)
Rhizamoeba clavarioides
Rhizamoeba clavarioides, Crailoo (Phase Contrast)
Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Haplomyxa spec

Fig. 1: Main cell body of specimen A, partly hidden by debris Haplomyxa sp. Three specimens were observed in a Petri dish, along with two

Read More »

Lachmannia spec.

“Lachmannia” spec., body length 127 µm “Lachmannia” spec. I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »

Diplophrys spec. 7

Diplophrys spec., with three tufts of filopodia Diplophrys spec. These cells are granular, never seen before. I found them in a sample from the Bert

Read More »

Psammonobiotus spec.

I found this specimen in a sample from the Oppad, near Hilversum, 2020. It is similar to Psammonobiotus linearis, but lacks a clear spine at

Read More »

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »